return and throw statements

Consider the statement

$$\begin{minipage}[t]{\linewidth}\begin{tabbing} \verb$return $$e$\verb$ ;$ \end{tabbing}\end{minipage}$$

where $e$ is an expression. As usual, $\mbox{\it INITS}$ and $e'$ are the results of applying the simplify algorithm to $e$. If $e' = e$, i.e. no simplification is required, the statement is untransformed. Otherwise the transformed version is

$$\begin{minipage}[t]{\linewidth}\begin{tabbing} \verb${$ \\ ... ...$return $$e'$\verb$ ;$ \\ \verb$}$ \end{tabbing}\end{minipage}$$

The throw statement follows exactly the same pattern.